Keypad Scanning Hardware/Firmware

Mike Hankey

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14 Jan 2011CPOL7 min read

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Scan any size switch matrix using 5 general purpose I/O ports.

keypad-ii.zip
- Keypad-II
  - Common.h
  - default
    - dep
      - Keypad-II.o.d
      - uart.o.d
    - Keypad-II.eep
    - Keypad-II.elf
    - Keypad-II.hex
    - Keypad-II.lss
    - Keypad-II.map
    - Keypad-II.o
    - Makefile
    - uart.o
  - keypad-ii.aws
  - Keypad-II.c
  - uart.c
  - uart.h

#ifndef _UART_H_
#define _UART_H_ 1

#define UART_BAUD_SELECT(baudRate,xtalCpu) ((xtalCpu)/((baudRate)*16L)-1)

//Method declaration
void uart_init(word);
void SendDataPacket(char*, byte);
void SendByte(byte);

#endif  //_UART_H_

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Written By

Mike Hankey

Retired

United States

Currently enjoying retirement and working on projects without pressure, deadlines or any kind of management.

Keypad Scanning Hardware/Firmware

License

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